Ventilator.



No. 702,58I. Patented lune I7, |902.

W. MCDERMUTI VENTILATDR.

(Application led Jan. 28, 1901.) l

(No Model.) 2 Sheets-Sheet I.

Patented lune I7, |902.

No. 702,5al.

' W." MGDERMUTT.

VENTILATUB.

l Application filed 3311.28, 1901.)

2 Sheets-Sheet 2.

(No Model.)

I [Q1/vena?? I Cerln/Qt.

UNITED STATES PATENT OFFICE.'

WILLIAM MCDERMOTT, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO AMOS WOOD, OF BOSTON, MASSACHUSETTS.

VENTILATOR.

SPECIFICATION forming part of Letters latent No. 702,581,6.ated June 17, 190.2. Application filled January 28, 1901. Serial No. 45.001. (No model.)

To all whom t may concern:

Beit known thatl, WILLIAM MCDERMQTT, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Ventilators, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention is an improvement in that class of ventilators illustrated in United States Patent No. 634,215, granted October 3, 1899, to C. F. Nickerson, and has for its 'principal object the provision of means permitting the noiseless and ready turning of the ventilator for maintainingitself in accurate operativel position. These ventilators depend for their operationupon the draft produced' therein by the wind blowing through them somewhat on the injectorprinciple, audit therefore becomes essential that they should maintain an accurate position in exact alinementwith the direction of the wind. Also as thewind is continually shifting, and hence the ventilators are correspondingly turning, and as any noise would prohibit the use of the ventilators on account of the disturbance to the rooms below, it is a serious problem tospro-v vide a construction in connection with the ventilator which will insure proper balance and noiselessness combined.

My improved ventilator is also specially constructed for maintaining itselfin `operative condition at all times by preventing the panying drawings, illustrative of a preferredv embodiment of my invention. p f

Figure 1 is acentral verticalsectional View 'of the ventilator.' Fig. 2 is a broken perspective of one part of-the bearing.l Fig. 3'

is a detail, inside elevation, of a portion of the bearing. Fig.' 4 'is a central vertical section of the bearing and adjacent parts, a portion of the sleev'eor shell being shown in side elevation. upper Washer.

Fig. 5 is a perspective view of the The general construction of the ventilator,

including the base'A, mainpipe or iiue A',

conical funnel B, inner defiector B', and vane B2, may be of the general shape and construction shown in the before-mentioned patent o any. other preferred form.

, These ventilators, it will be understood, are

intended to take the place of such 4devices as blowers and exhaust-fans, &c., which are operated by power and commonly provided for Ventilating large buildings, halls, theaters, 650;, and this ventilator instead of being operated by a. dynamo-engine or other usual power is entirely automatic and because of the injector principle operates with extreme efriciencyand certainty, continuing in opertion, moreover, unremittingly, and therefore being preferable to the other kinds of ventilaters mentioned, which are usually stopped when thebuilding is closed or not in use. It is essential, however, for the present kind of ventilator that it shall maintain its direction Vaccurately ywith the wind, as upon the latter depends the proper working of the exhaust feature orinjector principle of the ventilator, and in this connection it may be well to state briefly/,that the wind upon entering the flaringfmouth b of the ventilator which faces the wind is deflected by the apex b' and passes in aspr'ead-out form through the conical passageb2 and out at the enlargedY mouth b3 of the funnel in an attenuated condition, there by producing a powerful suction or tendency to avacunm within the inside funnel B' at b4, which in turn operates to cause a constant andpowerful upward draft in the pipe A',

provided the damper is-open, whichv is usu- ,ally' provided in theriiue leading from the room being ventilated to the ventilator.

The vane B2 has been heretofore depended timesyand also I have foundit' extremelyl dificult and, indeed, to be a very serious problem'to provide a bearing and cooperating construction capable of .accomplishing my object 1 under all conditions.' The present oonstruction, however, hasbeen found in practice to solve the problem, providing, as it does, a

main bearing for supporting the ventilator which is above the smoke and gases which pass through the ventilator and is so constructed and arranged that it cannot possibly become clogged, requires no lubricant, is not in a position to be affected by the weather, and maintains the ventilator in proper balance.

The ventilator is carried by a shaft c, having two stationary bearings in the pipe or ue A', the lower one consisting of a band c and a cross-bar c2, on which the shaft is retained by nuts c3 or other suitable means, and the upper bearing is shown as consisting of a cross-bar c4 simply. At its upper end the shaft c is provided with a fixed cone c5, shown as formed integrally with the shaft, on which travel a series of balls c6. These balls support the weight of the ventilator by bearing against a lower cupci, which is held in place by an annular rib o8 of a carrier o9. Above the rib cS is another cup cw, which holds a second series of balls cl2, traveling against an adjustable cone cl3. The upper end of the shaft is provided with threads c1'l and the upper cone c1S is threaded; but none of the other parts thus far mentioned are provided with threads, and I regard this feature of construction as of considerable value, because it enables me to put the parts quickly together and maintain them in accurate adjustment simply by turning up or down, as the case may be, the threaded cone cl3. All these parts are held in a sleeve or outside support C15, which is provided at its lower end with a flange c1, which may be secured against the inner surface of the deflectorB. The special carrier c9 is provided with threaded sockets in which are mounted screws c, passing through the sleeve orshell om as is clearly shown in Fig. 4, thereby retaining the shaft and bearing in its adjustment. Vhen once adjusted, the parts are maintainedV by a nut cls, which rests against a washer cw, having a tongue c2U traveling in a longitudinal groove 021 for preventing rotation thereof relatively to the shaft, and beneath the bearing I drive in a false washer c22 to prevent the entrance of dust and keep the ruiming parts perfectly clean. The whole bearing is inclosed in a water-tight cage or housing o23. Each cup has a retaining-Harige c, so that there is no possibility of the balls dropping out even though the parts may not yet be adjusted to working position.

It will be seen that the above construction is exceedingly simple and compact, and yet secures the objects intended in a very efficient manner. The upper balls provide steadiness, maintaining the ventilator against swaying movement, and the lower balls carry the weight of the ventilator noiselessly, being enabled to support the load (which at times of high wind is considerable) by reason of the heavy and strong form of carrier c, whose upright flanges or vertically-extendin g portion cooperate with the sleeve C15 in giving strength and rigidity of position, and the heavy annular rib cS gives a wide and strong bearing-support for the ball-cups. The latter not being threaded tend to automatically adjust themselves and take up such wear as may occur. If any unevenness or Wabbling occur, it may be instantly prevented simply by tightening the upper cone cl3.

Within the passage b2 the sleeve or shell C15 is provided with a plurality of openings c25, preferably opposite each other, for the purpose of keeping the parts cool by freely permitting the passage of the air as the wind blows through the Way b2.

In assembling the parts of the bearing they are simply dropped into the sleeve from the top thereof one after the other in the order shown in Fig. 4 and then secured by the screws c17 and the nut cls, and when in position the false washer or bottom G22 separates the bearing from the ventilator proper and prevents its becoming clogged by the action of smoke and gases or the accumulations of dirt.

At the lower end of the ventilator I provide an annular opening b5 between the flue A and an outside flue B3, this passage b5 being maintained in properly-centered position by the steadying balls cl2, as before explained, and serving to maintain the ventilator in operative condition at all times irrespective of whether the Hue A is closed or open.

It will be understood that on occasion it will be preferred not to use the ventilator for Ventilating the :room below, and accordingly the line A will be closed, under which circumstances if the passage b5 were not provided the rest of the ventilator might become clogged with leaves, cobwebs, or other debris, thereby rendering it inoperative when subsequently the damper controlling the flue A' might be opened, and because of the automatic character of this ventilator the users thereof below might not become aware of the fact that the ventilator was inoperative. For this reason it becomes especially important that the vacu um should remain in operation, and this is accomplished by the opening b5, which permits the ventilator to keep in operation even though the flue A' be closed.

It will be understood that I do not limit myself t-o all the details of construction and arrangement set forth at length in the above description, inasmuch a`s many changes in form, construction, and combination of parts may be resorted to Without departing from my invention, and accordingly I do not otherwise limit myself than as hereinafter expressed in the claims.

Having described my invention, what I IOS IZO

`roazasfi passage, alining mechanism for maintaining said ventilator in the direction of the wind,

for centering and balancing the ventilator,

and a sleeve independent of the shaft and rigidly secured to the ventilator for transmitting the weight thereof to said lower cone and provided with means for retaining said movable bearing in place. v

2. Ina ventilator, a bearing for centering and supporting the ventilator and permitting l it to turn freely in the direction of the wind,

said bearing comprising a sleeve mounted in the upper side of the ventilator, a carrier secured rigidly in said sleeve and provided with an annular rib, a shaft passing loosely centrally through said-rib and provided with a lower cone, a cupresting against the under side of said rib, balls `traveling between said cone and said cup, saidlcone supporting the Weight of the ventilator, a second cup oarried by said rib on the 'upper side thereof, balls therefor', and anv upper cone, said lower cone being integral with said shaft, and said upper cone being mounted adjustably on said shaft for cooperating vwith said u-pper cup and balls in centering and balancing the ventilator. l 1

3. In a ventilator, a bearing for centering and supporting the ventilator and permitting it to turn freely in the direction of the wind, said'bearing comprising asleeve mounted-in the upper side of the ventilator, a carrier secured fixedly in said sleeve and provided with an annular rib, a shaft passing centrally through said rib and `provided with a lower cone, said cone' being integral with said shaft and said carrier being independent offsaid shaft, a cup resting againsttheunder side ofV said rib, balls traveling between said cone and said cup, Vthe latter transmitting the weight of the ventilator from said rib to the lower c'o'ne to be borne by'thelatter, a second cup carried by said rib onV the upperside thereof, balls therefor, and an adjustable'cone'mounted' on said shaft for coperatin g with said upper cup and balls in centering andbalancing the ven- `andindependent ofI said'rib vand provided tilator, said shaft being threaded` to receivel said adjustable cone, and having a retaining'o nut and washer for maintaining the parts in adjustment. I

4. In a ventilator, a bearing for centering and supporting the ventilatorand permitting it to turn freely inthe direction of the wind, said bearing-comprising asleeve mountedin the upper side of the ventilator, a carrier secured to said sleeve andprovided with an annular rib, a shaft passing-centrallythrough withv an integral lower cone, a cup resting against the under side of said rib, balls travcling between said cone and saidcup, said V'balls' transmittingth'e weight of the ventilator from said rib to the lower cone,"a'sec'ond cup carriedby said rib on the upperside thereof, balls therefor, and an adjustable cone mounted on saidY shaft for cooperating `with saidupper cup and balls in centering and balancing the ventilator, said shaft being threaded to receive said adjustable cone, anda false washer or bottom fitting tightly around said rshaft-within said sleevebelowthe bearing, -said bearing being carried by'said ventilator entirely above the air-passage thereof out ofA line with the smoke andgas. b Y 5. In a ventilator, a conical funnel, a second conical funnel-within the same, provid-l 'ing a conical passagevbetweenthe two for'the passage of wind, and a stationary,` vertical 9o shaft for supporting said ventilator'and permitting the same to followthe direction of the wind, said shaft having a` movable bearing at its upperend, comprising a tubular sleeve or shell provided withaflange atits lower end `Asecured-to theinner sideof the inner funnel' about said shaft, a carrier mountedin thejupper end of said sleeve and inimovably secured' thereto, said carrier-having a'heavy annular rib extending inwardly transversely of said `too shaft, and a cone, fc'u'p and balls mounted'on opposite sides'o'f said'rib about saidfshaft, for Vthe -rotationv ofthe ventilator, thecups" being rigid withthe shaft," the lower'cu'p bear-l ing all theweight and downward thrusts,'ad 1o 5 the upper cup receiving the-sidewise thrusts" v and actingtocenterfthe ventilator and mainf j "tain it steady. l

In ktestimony whereof I havesigned my' name to this specification in thev presence -of 11o two subscribing witnesses. l

, ljNILLIAlld,MCDERMOTT Witnesses: A i j GEo. H. MAXWELL, GfEo.-W. GREGORY. 

